From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W1YW6-0004RR-SJ for kexec@lists.infradead.org; Fri, 10 Jan 2014 09:36:40 +0000 Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id D33453EE1D8 for ; Fri, 10 Jan 2014 18:36:11 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id C389C45DE55 for ; Fri, 10 Jan 2014 18:36:11 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.nic.fujitsu.com [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id A08CD45DE65 for ; Fri, 10 Jan 2014 18:36:11 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 914371DB804E for ; Fri, 10 Jan 2014 18:36:11 +0900 (JST) Received: from g01jpfmpwkw03.exch.g01.fujitsu.local (g01jpfmpwkw03.exch.g01.fujitsu.local [10.0.193.57]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 455301DB8049 for ; Fri, 10 Jan 2014 18:36:11 +0900 (JST) Message-ID: <52CFBECB.9040309@jp.fujitsu.com> Date: Fri, 10 Jan 2014 18:35:07 +0900 From: Yasuaki Ishimatsu MIME-Version: 1.0 Subject: Re: kdump failed because of hotplug memory adding in kdump kernel References: <20140109145035.GB25897@redhat.com> <1389283439.1792.66.camel@misato.fc.hp.com> <20140109162427.GF25897@redhat.com> <1389288265.1792.108.camel@misato.fc.hp.com> <20140109182310.GG25897@redhat.com> <1389292470.1792.109.camel@misato.fc.hp.com> <20140109212705.GC12111@redhat.com> <1389304583.1792.139.camel@misato.fc.hp.com> <20140110071124.GA6464@dhcp-16-105.nay.redhat.com> <52CFAA20.2010109@jp.fujitsu.com> <20140110091433.GA14074@dhcp-16-105.nay.redhat.com> In-Reply-To: <20140110091433.GA14074@dhcp-16-105.nay.redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Baoquan Cc: Toshi Kani , "Rafael J. Wysocki" , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, tangchen@cn.fujitsu.com, linux-acpi@vger.kernel.org, zhangyanfei@cn.fujitsu.com, dyoung@redhat.com, Vivek Goyal (2014/01/10 18:14), Baoquan wrote: > > >In ns >>> object tree, they are not treated as hotplug memory. >> >> wrong. >> They are treated as hotplug memory. But the memory cannot hot removed >> because the memory has kernel memory. >> >>> Otherwise, any hotplug memory which is not reserved for 2nd kernel can >>> be parsed and need be added as hotplug memory, and add them into movable >>> zone. >> >> wrong. >> The memory is allocated as normal zone and it is offline. > > Hi, > > Thanks for answering. > > I am confused. Now the fact is in 1st kernel memory is reserved for > crashkernel and passed to 2nd kernel by exactmap. Then in 2nd kernel, > reserved memory regions are added into e820. Later hotplug memory still > trigger add_memory, and cause bug I reported. Does the issue occur even if you apply the following Prarit's patch to your kernel and add no_memory_hotplug boot option to 2nd kernel? http://marc.info/?l=linux-acpi&m=138922019607796&w=2 Thanks, Yasuaki Ishimatsu > > >> >>> >>> Am I right? >>> >> >>> The other question, e820 reserve is done earlier than acpi >>> initialization, because acpi_early_init() invocation is very late in >>> start_kernel(). Does that means at the very beginning all memorys are in >>> e820, later when acpi_early_init is called, hotplug memory is detected, >>> they will be moved to different place or need be marked with a specific >>> flag? >> >> No. >> >> Thanks, >> Yasuaki Ishimatsu >> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec